Schema.org is an initiative from Google, Yandex, Bing, and Yahoo! to create and support a common set of schemas for structured data markup on the web. Webmasters add schema.org markup to their pages to help search engines better understand their websites.

The site owner community rapidly adopted schema.org.

Even though it takes time and effort to add this markup to your pages, schema.org allows you improve how your sites appear in search results on all major search engines: Google, Yandex, Bing, Yahoo! and others.